JPS61191969U

JPS61191969U -

Info

Publication number: JPS61191969U
Application number: JP7739285U
Authority: JP
Priority date: 1985-05-24
Filing date: 1985-05-24
Publication date: 1986-11-29

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例である油圧回路を示
す回路図である。１……ポンプユニツト、２……パワーステアリ
ング装置、３……ブレーキ倍力装置、４……リザ
ーバタンク、５……主ポンプ、６……流量調整弁
、７……リリーフ弁、８……絞り、９……複動シ
リンダ装置、１０……方向制御弁、１１……ハン
ドル、１２……シリンダ装置、１３……可変絞り
弁、１４……リリーフ弁、１５……補助電動ポン
プ、１６……ブレーキペダル、１７……ブレーキ
作動装置、１８……迂回路、１９……差圧弁（開
閉弁）。 FIG. 1 is a circuit diagram showing a hydraulic circuit according to an embodiment of the present invention. 1... Pump unit, 2... Power steering device, 3... Brake booster, 4... Reservoir tank, 5... Main pump, 6... Flow rate adjustment valve, 7... Relief valve, 8... Throttle , 9...Double acting cylinder device, 10...Direction control valve, 11...Handle, 12...Cylinder device, 13...Variable throttle valve, 14...Relief valve, 15...Auxiliary electric pump, 16... Brake pedal, 17...Brake actuation device, 18...Detour, 19...Differential pressure valve (on/off valve).

Claims

[Scope of Claim for Utility Model Registration] (1) By connecting the brake booster to the pump unit downstream of the power steering device, the hydraulic drive source of the brake booster is shared with the power steering device. In the hydraulic circuit configured as above, a detour is provided that detours around the power steering device, and an on-off valve is interposed in this detour, and this on-off valve is connected to the primary side pressure of the power steering device. A hydraulic circuit characterized in that it is configured to open when a differential pressure with a secondary side pressure exceeds the maximum effective pressure of a power steering device. (2) The hydraulic circuit according to claim 1, wherein the set pressure of the on-off valve is set lower than the relief pressure of the relief valve in the pump unit.